This undated handout image obtained March 28, 2021, courtesy of The National Institue of Allergy and Infectious Diseases/ NIH shows a transmission electron microscope image of SARS-CoV-2, the virus that causes Covid-19, isolated from a patient in the US, as virus particles are shown emerging from the surface of cells cultured in the lab, the spikes on the outer edge of the virus particles give coronaviruses their name, crown-like - The novel coronavirus has killed at least 2,777,761 people since the outbreak emerged in China in December 2019, according to a tally from official sources compiled by AFP at 10H00 GMT on March 28, 2021. At least 126,622,220 cases of coronavirus have been registered. The vast majority have recovered, though some have continued to experience symptoms weeks or even months later. (Photo by Handout / National Institute of Allergy and Infectious Diseases / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO /NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES/NIH/HANDOUT " - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS
This undated handout image obtained March 28, 2021, courtesy of The National Institue of Allergy and Infectious Diseases/ NIH shows a transmission electron microscope image of SARS-CoV-2, the virus that causes Covid-19, isolated from a patient in the US, as virus particles are shown emerging from the surface of cells cultured in the lab, the spikes on the outer edge of the virus particles give coronaviruses their name, crown-like - The novel coronavirus has killed at least 2,777,761 people since the outbreak emerged in China in December 2019, according to a tally from official sources compiled by AFP at 10H00 GMT on March 28, 2021. At least 126,622,220 cases of coronavirus have been registered. The vast majority have recovered, though some have continued to experience symptoms weeks or even months later. (Photo by Handout / National Institute of Allergy and Infectious Diseases / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO /NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES/NIH/HANDOUT " - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS
/ HANDOUT
Por Agencia EFE

La investigación internacional para buscar el origen del coronavirus SARS-Cov-2 está estancada y la ventana de oportunidad para realizar algunos estudios científicos clave “se está cerrando rápidamente”, aseguran los expertos independientes encargados de esa misión.